"Haiti was not a natural disaster," says TED Fellow Peter Haas: "It was a disaster of engineering." As the country rebuilds after January's deadly quake, are bad old building practices creating another ticking time bomb? Haas's group, AIDG, is helping Haiti's builders learn modern building and engineering practices, to assemble a strong country brick by brick.

Inveterate tinkerer Peter Haas is the co-founder of AIDG, the Appropriate Infrastructure Development Group, which connect people to electricity, sanitation and clean water through a combination of business incubation, education, and outreach.
Full bio